Difference between sculpting in video tutorials and in reality

Hello everyone! After watching some videos on blender, namely on sculpting, I faced the following problem: it does not match my expectations. The problem is not in my skills, but in the fact that the sculpture is different from what it looks like in the video, for example: in the video, the author uses subdivision surface, and he gets a smooth model, even during sculpting, but when I do it, the model turns out to be somehow curved during the same sculpting process, although the number of faces is the same as in the video.